【摘要】 以多泥沙河流上修建的某引水枢纽为参考,通过物理模型试验来研究抛石粒径对防冲槽结构和冲刷的影响,得出了在一定单宽流量下防冲槽的压力、流速分布以及防冲槽深度和坡度、抛石粒径等试验值,并且围绕护坦(海漫)末端冲刷计算经验公式以及泥沙起动流速研究进行了初步探讨。通过研究分析,认为护坦(海漫)末端接防冲槽处宜设置垂直深隔墙,防冲槽内上游坡1∶3～1∶6,下游设置约1∶5～1∶10的仰坡并且趋缓更宜;防冲槽内抛填均一粒径40 cm～60 cm的卵石比较合适;冲刷坑深度计算公式建议采用水闸设计规范公式。更多还原

【Abstract】 Based on the sediment rich river on a certain diversion hub, riprap grain size was analyzed by physical model experiment of the notching structure and the influence of scouring under a certain flow rate per unit width against pressure. Velocity distribution and aggressive notching notching depth and particle size of the slope, riprap, such as the test results and around apron diffuse(sea) was acquired and discussed and around the scouring calculation experience formula and the incipient motion velocity. Through research and analysis, it is concluded that the vertical deep partition wall should be set at the end of the protection tank(oversea) to connect the anti-flush groove, the upstream slope of the anti-flush groove should be 1∶3～1∶6, and the downstream slope should be 1∶5～1∶10, and the slope should be slower. A pebble with a particle size of 40 cm～60 cm is more suitable to be tossed and filled in the anti-punching groove. The formula of scour pit depth calculation in the sluice design specification is recommended.更多还原